Valve Inspection

WARNING: This page is about a different car, the 2006 Lincoln Navigator and 2006 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

Inspect the following valve areas:
1. the end of the stem for grooves or scoring
2. the valve face and the edge for pits, grooves or scores
3. the valve head for signs of burning, erosion, warpage and cracking
4. the valve margin for wear
  
  Fig 1: Identifying Valve
  Courtesy of FORD MOTOR CO.